Malicious PDF — malware analysis report

Static analysis result for SHA-256 d53a2715c11003a3…

MALICIOUS

PDF

77.1 KB Created: 2021-03-12 02:06:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 5314eceb166759f85f10b678641c22db SHA-1: 9f55c5009164427751bdd225c968b8fa77c967cd SHA-256: d53a2715c11003a3854a7b65a7e9d40610b9eea3c3dc42d343dff5591924cc9a
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged by multiple heuristics as malicious, including ML classification and ClamAV detection, indicating it is a phishing attempt impersonating Amazon. It contains numerous embedded URLs, with a specific redirector pointing to a Weebly hosted PDF, suggesting a multi-stage attack. The presence of PDF_SEO_DISPOSABLE_LINK_FARM and PDF_URI rules indicates a link farm designed to distribute malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Brand-impersonation credential phishing lure critical SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: action link to abused redirector https://biligimanud.weebly.com/uploads/1/3/1/4/131454089/torigatobu_gopuxisomi_panukiwezalowi_jedutezazij.pdf.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ponafet.ru/wix?keyword=ftce+elementary+education+k-6+study+guide+2019+free PDF link annotation
    • http://lnstagramverificationbadge.com/96799284693vqtxc.pdfIn PDF document text
    • https://biligimanud.weebly.com/uploads/1/3/1/4/131454089/torigatobu_gopuxisomi_panukiwezalowi_jedutezazij.pdfIn PDF document text
    • http://tur8osale.site/706958323897v0jw.pdfIn PDF document text
    • http://micrometer25bill.site/learn_to_draw_books_for_8_year_oldsuzdtb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388814/normal_5fc666174d784.pdfIn PDF document text
    • https://muxuxinipizo.weebly.com/uploads/1/3/1/6/131637853/fexuse_muxivulap.pdfIn PDF document text
    • https://debuvubuni.weebly.com/uploads/1/3/4/8/134846467/876008.pdfIn PDF document text
    • http://wifonivibigi.22web.org/espresso_english_vocabulary.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468838/normal_600eb99b13ec1.pdfIn PDF document text
    • https://kajanivok.weebly.com/uploads/1/3/2/8/132814977/dagepida.pdfIn PDF document text
    • https://denijebif.weebly.com/uploads/1/3/4/5/134584122/kasoselosuxesax.pdfIn PDF document text
    • http://big-ita.space/lijarutidoparek4pwhi.pdfIn PDF document text
    • http://itash.space/vapoguwabokivajspuxq.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/zuwimadaneb/balloon_archery_game.pdfIn PDF document text
    • http://mufunalera.rf.gd/los_angeles_lakers_cap_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/vazisi/18038073744.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/df4cdbd3-71d1-4184-9959-1099c673cf0c/7716628991.pdfIn PDF document text
    • https://s3.amazonaws.com/jiwisi/sears_109_lathe_manual.pdfIn PDF document text
    • http://giredixilin.epizy.com/23304311672.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e02e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE02E 6012 bytes
SHA-256: aaef5a2290efce2e56da0dff676d8948f82a79a9f1a5dc7ecbb015551234501b
font_01_sfnt_off0000f492.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF492 10420 bytes
SHA-256: 8866cfffaa25db26b58fdd8e4c3c788b7e4201dbe3a538fd4cc3bc12d94196ba
font_02_sfnt_off0001182e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1182E 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34